StableGI brand of Saccharomyces boulardii is the probiotic you need for modern life. It will stimulate your immunity and support your digestive system against the stress of a hectic lifestyle. Improving our microbiome will improve our health. StableGI brand of Saccharomyces boulardii is a great choice for a safe and effective probiotic. Room temperature stable it is easy to travel with. Try a bottle, if you are not satisfied we will refund your purchase price.